Low maximum volume with pulseaudio on kde

[John Woodhouse]

----- Original Message -----

> From: Duncan <1i5t5.duncan at cox.net>
> To: kde at mail.kde.org
> Cc: 
> Sent: Thursday, 16 June 2011, 1:33
> Subject: [kde] Re: Low maximum volume with pulseaudio on kde
> 
> Sérgio Basto posted on Wed, 15 Jun 2011 23:04:26 +0100 as excerpted:
> 
>>  3rd - run on user env:
>>  pulseaudio -vvv
>> 
>>  lets test with kmix I see on pulseaudio logs at maximum :
>> 
>>  D: alsa-sink.c: Requested volume: 0: 100% 1: 100%
>>  D: alsa-sink.c: Got hardware volume: 0: 100% 1: 100%
>>  D: alsa-sink.c: Calculated software volume: 0: 100% 1: 100%
>>  (accurate-enough=yes)
>> 
>>  with gnome-control-center -> sound I see on pulseaudio logs at maximum :
>> 
>>  D: protocol-native.c: Client gnome-control-center changes volume of sink
>>  alsa_output.pci-0000_00_1b.0.analog-stereo.
>>  D: alsa-sink.c: Requested volume: 0: 153% 1: 153%
>>  D: alsa-sink.c: Got hardware volume: 0: 100% 1: 100%
>>  D: alsa-sink.c: Calculated software volume: 0: 153% 1: 153%
>>  (accurate-enough=no)
>> 
>>  so how I put kmix also control "software volume" ?
>>  thanks,
> 
> FWIW, the messages are coming in, but I don't do pulse-audio at all so 
> can't help with it, my main machine plays (digital output, kmix doesn't 
> do anything anyway) thru my home 5.1 system so has plenty of volume, and 
> while my netbook sound is a bit soft, I'm not using it enough for that to 
> have worried about it.
> 
> So at least here, not much I can suggest...  As it seems I'm one of the 
> more active regulars as well as one of the more technically inclined 
> regulars, unfortunately, the lack of response could well mean no one else 
> has a clue either.
> 
> Meanwhile, while I don't know much about pulse audio, I do know a bit 
> about audio in general and computer audio in general, and it seems to me 
> that if pulse can be set to further boost volume in software, as we see 
> gnome doing, there's a good chance that you can configure it to do so by 
> default, regardless of the client used to control it.  But you'll likely 
> have more luck researching either the pulse documentation or googling it, 
> or asking on the pulse-audio lists or forums, which I presume they have 
> tho I've no real idea, personally.  Barring someone stepping up here 
> right away with more info, that's where I'd be looking next.  Try 
> googling 
> on the three terms "linux pulse gain" (without the quotes as that 
> would 
> try to match those specific words in that specific order).
> 
> I hope you find a working solution.
> 
> -- 
> Duncan - List replies preferred.   No HTML msgs.
> "Every nonfree program has a lord, a master --
> and if you use the program, he is your master."  Richard Stallman
> 
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I had a similar problem a long time ago. I never really got to the root of the problem as installing mplayer via cvs cured it. It's volume control altered sound levels in all apps. From this I suspect it's a layers of software problem and that there is a lower level volume control some where. I don't know what shell function can alter that.

Rather recently I have noticed that VLC plays things with more volume than other applications that use sound. That may be purely down to phonon back ends.

John
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